Add sugar, cherry juice, cinnamon, nutmeg and salt to a medium saucepan. Bring to a low simmer over medium heat. Simmer until the sugar has completely dissolved, stirring frequently. 

Remove from heat and stir in brandy and rum until combined. 

Stir in cherries until coated. 

Store in clean mason jars, cooling to room temperature before placing in the refrigerator. Refrigerate overnight before serving.